7. If the zeros of the quadratic polynomial ax2 +b x + c , c ≠ 0, are equal then,
a) c and a have opposite signs b) c and b have opposite signs
c) c and a have the same sign d) c and b have the same sign

9. If one of the zeros of a quadratic polynomial of the form x2 + ax + b is negative of the other, then it
a) has no linear term and the constant term is negative
b) has no linear term and the constant term is positive
c) can have a linear term but the constant term is negative
d) can have a linear term but the constant term is positive.

10. Which of the following is not the graph of a quadratic polynomial ?

11. If one of the zeros of the quadratic polynomial ax2 + b x + c , a ≠ 0, is zero, then the other zero is
a) c/a b) a/b c) -a/b d)-b/a